Which of the following statements regarding the Plains Indians and ranching are true?

i. Washington officials hoped that cattle ranching would make the Plains Indians self-sufficient.

ii. Most Plains tribes struggled with adapting to ranching.

iii. The Arapaho had the most difficulty converting to ranching.

A. i. only

B. i. and ii. only

C. ii. and iii. only

D. i., ii., and iii.